NewDiverseYouthNightSchool/application/common/model/school/Area.php

<?php

namespace app\common\model\school;

use think\Model;

/**
 * 区域数据
 */
class Area extends Model
{

    // 表名,不含前缀
    protected $name = 'school_area';
    // 追加属性
    protected $append = [
    ];



    public function child()
    {
        return $this->hasMany(self::class,'pid');
    }

}